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tweaks iosched for better android performance

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SecureCRT 2012-09-24 22:35:24 +08:00 committed by tytung
parent 1b9c88acd9
commit bda745315c
1 changed files with 4 additions and 4 deletions
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8
block/deadline-iosched.c
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@ -17,10 +17,10 @@
/*
* See Documentation/block/deadline-iosched.txt
*/
static const int read_expire = HZ / 2; /* max time before a read is submitted. */
static const int read_expire = HZ / 4; /* max time before a read is submitted. */
static const int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */
static const int writes_starved = 2; /* max times reads can starve a write */
static const int fifo_batch = 16; /* # of sequential requests treated as one
static const int writes_starved = 4; /* max times reads can starve a write */
static const int fifo_batch = 1; /* # of sequential requests treated as one
by the above parameters. For throughput. */
struct deadline_data {
@ -362,7 +362,7 @@ static void *deadline_init_queue(struct request_queue *q)
dd->fifo_expire[READ] = read_expire;
dd->fifo_expire[WRITE] = write_expire;
dd->writes_starved = writes_starved;
dd->front_merges = 1;
dd->front_merges = 0;
dd->fifo_batch = fifo_batch;
return dd;
}